Re: Farmall M vs 560 ?

Oh my. Let me try to straighten things out a bit. I'm try to find out about transmission and mostly rear end issues.

Just to clear up things also, this tractor will be an antique V-8. I will be doing a lot of what I call "standard practices" to improve the strength of the components. The HP. applied will be aprox. 750 to 850.

560 rears with all improved parts installed in the transmission and rear are the strongest. They put in a stronger differential with tapered bearings to support it. Different bull pinion gears with bigger support bearing. Bull gears also with a different tooth angle. Then they started offering a roller inner axle bearing and a roller bearing to support the rear of the transmission main shaft. Also after a serial number break the rear main shaft bearing housing along with the transmission housing was changed from 3 bolt to 4 bolt support like a 660. 400 and 450 rears are much like a 560 so some parts interchange. Between SMTA to 450 W and F models and all the 560 models and the 660 several different transmission gear speeds and ring and pinion combinations can be used. F-560 has a deeper reduction R&P than the SMTA to F-450. Also standard first was deeper on a F-560. High speed 1&R on a F-560 was the same as SMTA to 450. 3rd and 4th gears also have more than one choice. Like someone said if using a T/A and depending on if shifting more than once a pull, at least the T/A clutch needs beefed up and the rest in top condition. Don't know about some of the beefed up T/A units, get conflicting reports. from the rear of engine back a SMTA to 560 is the same. If I remember correct that's 5 inches longer than a M for the same distance.

it would be closer if it was a 400 or 450 vs 560 chassis....then a M....the 400/450 are 4 inches longer than a M plus have ta's just like a 560....either way you will have to buy a heavy duty ta that can take it if you know what I mean and a heavy duty clutch the rear end weather 560 or m 400/450 send out rear gears and get a good limited slip to make it pull better. gears and stuff in rear are strong in both tractors.....hope this helps im not getting into the other motor stuff they did enough of that in other posts I know your going v8.....

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